Hair colorants and an application mixture for coloring human hair

Abstract

A solid hair colorant composition in powder or granular form containing from 1 to 10% by weight of at least one oxidation dye precursor, from 10 to 35% by weight of an oxidizing agent, from 3 to 25% by weight of a substantive plant dye or 25 to 70% by weight of henna neutral, and optionally conventional cosmetic additives.

What is claimed is: 
     
       1. A solid hair colorant composition in powder or granular form, said colorant composition comprising from 1 to 10% by weight of at least one oxidation dye precursor, from 10 to 35% by weight of an oxidizing agent, from 3 to 25% by weight of a substantive plant dye or 25 to 70% by weight of henna neutral, and optionally conventional cosmetic additives, based on the weight of said solid hair colorant composition. 
     
     
       2. A hair colorant composition as in claim 1 wherein said oxidation dye precursor comprises at least one primary intermediate and at least one secondary intermediate dye precursor. 
     
     
       3. A hair colorant composition as in claim 2 wherein said primary intermediate dye precursor is selected from the group consisting of p-phenylenediamine, p-toluylenediamine, 2-(2-hydroxyethyl)-1,4-diaminobenzene, p-aminophenol, 3-methyl-4-aminophenol, 2,4,5,6-tetraaminopyrimidine and 2-hydroxy-4,5,6-triaminopyrimidine. 
     
     
       4. A hair colorant composition as in claim 2 wherein said secondary intermediate dye precursor is selected from the group consisting of ∝-naphthol, resorcinol, 4-chlororesorcinol, 2-methyl resorcinol, m-aminophenol, m-phenylenediamine, m-toluylenediamine, 1,5- or 1,7-dihydroxynaphthalene, 5-amino-2-methylphenol, and 6-amino-2-methylphenol. 
     
     
       5. A hair colorant composition as in claim 1 wherein said oxidizing agent is selected from the group consisting of an addition compound of hydrogen peroxide with urea, melamine, potassium perborate, sodium perborate or ammonium peroxodisulfate, and mixtures thereof. 
     
     
       6. A hair colorant composition as in claim 1 further containing a synthetic substantive dye. 
     
     
       7. A hair colorant composition as in claim 6 wherein said synthetic substantive dye is selected from the group consisting of 4-hydroxypropylamino-3-nitrophenol, HC Red No. 3, N,N'-bis-(2-hydroxyethyl)-2-nitro-p-phenylenediamine, HC Blue No. 2, HC Yellow No. 2, HC Yellow No. 12, HC Blue No. 12, and 2-amino-6-chloro-4-nitrophenol. 
     
     
       8. A hair colorant composition as in claim 1 further containing 1 to 30% by weight of an inert organic compound having a melting point below 50° C., based on the weight of said hair colorant composition. 
     
     
       9. A hair colorant composition as in claim 8 wherein said inert organic compound is selected from paraffin oil, triglycerides, fatty alcohols and polysiloxanes. 
     
     
       10. A hair coloring application composition containing a mixture comprising 15 to 25% by weight of a hair colorant composition comprising from 1 to 10% by weight of at least one oxidation dye precursor, from 10 to 35% by weight of an oxidizing agent, from 3 to 25% by weight of a substantive plant dye or 25 to 70% by weight of henna neutral, and optionally conventional cosmetic additives, based on the weight of said hair colorant composition, and 75 to 85% by weight of water, based on the weight of said application composition. 
     
     
       11. A hair coloring application composition as in claim 10 having a pH of 5 to 12. 
     
     
       12. A process for preparing a solid hair colorant composition in powder or granular form comprising mixing from 1 to 10% by weight of at least one oxidation dye precursor, from 10 to 35% by weight of an oxidizing agent, from 3 to 25% by weight of a substantive plant dye or 25 to 70% by weight of henna neutral, and optionally conventional cosmetic additives, based on the weight of said solid hair colorant composition, and then adding to said solid hair colorant composition from 1 to 30% by weight of an inert organic compound having a melting point below 50° C., based on the weight of said hair colorant composition.